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    <meta charset="UTF-8">
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    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <script>
        //创建promise对象
        const p = new Promise((resolve, reject) => {
                // resolve('用户数据')
                reject('失败啦!')
            })
            //await要放在async函数中
        async function main() {
            try {
                let result = await p;
                console.log(result);
            } catch (e) {
                console.log(e);
            }
        }
        main();
    </script>
</body>

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